*Note* this information was posted by my boyfriend
Warm the motor up with a few moments of normal driving.
Then drive it hard for about 5 to 10 minutes, including gearing down the transmission manually to generate some engine braking....ie. pull it down to 2nd gear and make the motor hold back some to.
Then accelerate hard, and engine brake again.
Then park it, lt it idle down for 30 to 60 seconds, and shut it off.
Let it cool for an hour or more, and repeat the original step.
Do this about 5 times, and then change the oil and filter.
Its now broken in.
Baby an engine, and it will never generate perfect ring seal.
And metal parts need to be heat cycled too.
Change the oil early on as well, do not leave it in the motor full of crap for long.
If you need more info GOOGLE "Motoman" and read up.
As a mechanic I have rebuilt, modded and broken in many engines.
Drive it slow, and it will always be slow.....my 2 cents